zhǐ​shàng​tán​bīng

idle theorizing

纸上谈兵 (紙上談兵) zhǐ​shàng​tán​bīng
idle theorizing idiom
engaging in impractical or theoretical discussion that is useless in actual practice; literally planning military tactics on paper

Frequency

Movie subtitles
0.480 per million appears in 0% of films
Written text
0.836 per million

Sources

Definitions
CC-CEDICT